Drilling-machine



(No Model.) 2 Sheets- Sheet 1. J P C A D E L L DIIILLING MACHINE. No.468,328. Patented Feb. 9, 1892.

Iuunmlmnumy Im] un WHW lz'fnesses I(No Model.) 2 Sheets--Sheet 2.

J. P. GADBLL.

DRILLING MACHINE.

No. 468,328. rPatented Peb. 9, 1892..

NUNITED STATES PATENT OFFICE.

JOHN FRANKLIN OADELL, OF BALTIMORE, MARYLAND.

DRlLLlNG-IVIACHINE.

SPECIFICATION forming part of Letters Patent No. 468,328, dated February9, 1892.

Application tiled May 8, 1891. Serial No.3921055. (No model.)

To @ZZ whom it may concern.:

Be it known that I, JOHN FRANKLIN CADELL, a citizen of the UnitedStates, residing at the city of Baltimore, in the State of Maryland,have invented certain new and useful Iinprovements in Press-Drills; andI do declare the following to be a full, clear, and exact description ofthe invention, such as will enable others skilled in the art to which itappertains to make and use the same.

I have improved the drilling-machine in the provision of an attachmentfor supporting the work whereby it can be presented to the drill quicklyand easily, and more especially in the provision for supporting the Workin the direction of the strain or pressure of the drill in aconstruction Which gives all the advantages of What is known as a radialdrill without the disadvantages of an overhanging swinging arm ordrill-support, wherein the strain is in a direction to cause the radialarm or drill-supporting parts to give and sag at its non-supported endand become out of true working relation from wear at the sleeve bearingon the standard or column.

By my improvement the work-supporting device is mounted upon the base ofthe standard or column, so as to be free to have a complete revolutionand to have a rectilinear movement in whatever position it may be turnedto present the work to the drill, so that the pressure and strain uponthe Worksupporting device will at all times be supported and resistedcentrally with the drill.

In the accompanying drawings I have illustrated myinvention as appliedto the ordinary drill-press; but it may be used With any construction ofstandard drill or drilling-machine adapted for use with the ordinaryrevoluble Work-support.

Referring to the drawings, Figure l is a side elevation of a drill-presshaving my improvement applied thereto. Fig. 2 is a verticalcross-section of my improved Work-supporting device on the line w oo ofFig. l. Fig. 3 is a top View of the Work-supporting table. Fig. Il is atop view of the rectilinear movable ring-frame for the work-supportingtable in the position it occupies upon the base-track rails; and Fig. 5is a sectional view of one of the roller-ways for the rectilinearmovable ring-fraxne.

A is the base, and Bis the column or standard which carriesthedrill-spindle and its operating parts, and these parts may be of anysuitable construction.

The Worksupporting device, which embodies my invention, is arranged uponthe base, upon which I secure a track preferably composed of two I-beamsa a, which are braced together in parallel relation to each other andsecured to thebase by clamps l), as shown, or in any suitable Way. Thesetrack-beams preferably stand in the saine direction as the drill-bearingarms and are equally disposed on each side of a line drawn through theaxis of the drill. For each track-beam a roller-way is provided,consisting each of a separate linev of iianged rolls c, connected byside plates (l, which serve to hold the rolls at the proper distancesapart, whereby they form guideways fitting on each side of thetrack-beams to hold the roller-way thereon and allow it to have freemovement upon the track-beams. The rolls are preferably adapted to turnfreely upon their axis-pins, and the side plates are secured upon thelatter by nuts and washers, as shown in Fig. 5. Upon these separate andindependent roller-Ways,wl1ich are fitted upon the track-beams, I mounta webbed ring f, having parallel trackways or parts f, corresponding tothe roller-Ways and supported by and movable thereon with arectilinearmovement only, heilig properly retained upon the roller-waysby means of their flanges, which form guideways at the top of the rolls,fitting on each side of the ring trackways f. Upon this Webbed ring Imount the revoluble Worksupporting table g, Which is secured to a hub gof the webbed ring by a pivot-bolt 71,011 which it can have the usualrotary adjustments for presenting the work to the drill.

To provide for an easy revoluble movement for the table I place balls c'at suitable intervals in a groove on the surfaceof the ring part of therectilinear movable web, on which balls the table rests at itscircumference, as seen in Figs. 2 and 4, while at its center the tableis supported upon balls n, preferably seated on the upper end of a tubem, which forms a sleeve for the table center bolt, and is madevertically adjustable Within the hub ofthe webbed ring by means of ascrew-thread on the outer side of the sleeve and a match- IOO ingscrew-thread in the hub ofthe Webbed ring, the said sleeve-bearing beinglocked when set by lock-nuts S, as seen in Fig. 2. This capacity foradjustment gives an even bearing at the center and at the circumferenceof the table and alloWs the latter to have a free turning movement. Thistable is formed With the usual radial slots for receiving the usualclamps for securing the article to be. drilled. This table therefore iscapable of` both free rotary and free rectilinear or side movements, soas to present the Work properly under the drill and thus save labor andtrouble in moving the work on the table. The construction forobtainingrthis free compound movement of the work-supporting table isdurable, greatly facilitates the Work, and

greatly lessens the labor of the workman in manipulating the Work, Whileit gives the Very important advantage of supporting the Work in truerelation to the drill.

Vhile I prefer to mount the ring table-su pport on independentroller-Ways, as showny Work-supporting table, a rectilinear movablesupport therefor, independent roller-Ways for the latter, and fixedtrack-beams for said roller-Ways, for the purpose stated.

3. In a drill, a Work-supporting device consisting of a revoluble table,a supporting-ring having parallel trackways, xed track-beams incoincident relation to said trackways, and intermediate roller-Ways,substantially as described, for the purpose stated.

et. In a drill, the combination of a revoluble Work-supporting table,the Iixed track-beams, and an intermediate table-support adapted to havea free rectilinear movement upon said fixed track-beams, for the purposestated.

5. The combination, in a drill, of the revoluble Work-supporting table,a support therefor .having parallel trackways, ixed trackbeams incoincident relation to said track- Ways, and means for securing thetable-support for rectilinear movement upon the trackbeams, consistingof the flanged rolls connected in lines by plates, so as to formguideways for the track-beams .and for the track- Ways of thetable-support, substantially as described.

In testimonywhereof I have hereunto signed my name in the presence oftWo Witnesses.

JOHN FRANKLIN CADELL.

Witnesses:

Trios. SMITH, G. R. WAGNER.

